NEGATIVE ELECTRODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERIES, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

The purpose of the present invention is to improve the initial charge/discharge efficiency of a non-aqueous electrolyte secondary battery which uses a silicon material as a negative electrode active material. A negative electrode active material particle (10) according to one embodiment of the present invention is provided with a base particle (13) which includes: a lithium silicate phase (11) represented by Li2zSiO(2+z) {0